I mostly work in the square format as you see on my website. But I can do any size that you like. Below is an idea of the square canvas prices. 
15 cm x 15 cm canvas - €125 (comes framed 20 cm x 20 cm)
20 cm x 20 cm canvas - €175 (floating frame 22 cm x 22 cm)
30 cm x 30 cm canvas  - € 262 unframed
40 cm  x 40 cm canvas - €350 unframed
50 cm x 50 cm canvas - € 450 unframed

I work from photos, you can email me the photos and I can see which ones would translate best onto canvas for the size you want. I would like photos that are in sharp focus and where the eyes are clearly visible.

I usually ask for 50% deposit up front, then get the balance when finished adding shipping. 

If you have any other questions do not hesitate to ask.

Many thanks for you interest in commissioning an art work.